Blanking-press.



W. SKRZYNECKI.

BLANKING PRESS. I APPLICATION F1110 1uLY 1. 191s.

1,298,806. Patented Apr. 1,1919.

73 I 72 4 SHEETS-SHEET 2.

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' By @a m A TTUHNEY W. SKRZYNECKI.

BLANKING PRESS.

APPLICATION HLED JULY 1. 191s.

1 ,298,806. Patented Apr. 1, 1919.y

4 SHEETS-SHEET 3.

A TTORNEY W. SKRZYNECKI.

BLANKING PRESS.

APPLICATxoN FILEDYJULY l. ma.

1,298,806., l Patented Apr. 1,1919.

4 SHEETS-SHEET 4.

if 45 194 y .l a u l/ /l a n 7g [J Je 47 n n n y JZ '10/ A g A 7TOHNEYWAWRZYNIEC SKRZYNECKI, OF CHICAGO, ILLINOIS.

BLANKINGFPRESS.

Application led July 1, 1918. Serial No.242,795.

' the following ,is a specification.

This invention relates to improvements in blanking'` presses, andparticularly to types adapted Vto operate upon relatively thin material,.as paper, `,clothor leather, and has as its speciali-object.the'p-rovision of means whereby a plurality of differently shaped diesare interchangeably mounted upona rotatable holder so that any desiredsize ma be brought into position for use. v

A further object is to provide means whereby the dies are properlycentered when brought into operative posi-tion, it being understood thatthe plunger stamps are readily interchangeable within their holders.

These andother like objects are attained i by the novel constructionv,and combina-tion of parts hereinafter described and shown in theaccompanying drawings, forming a material part of this disclosure, andin which Figure 1 is a side elevational view showing a blanking pressmade in accordance ingv with the invention, parts being broken away inorder to disclose the construction.

Fi 2 is a similar view of the same lookfgrom the side.

Fig. 3 is a vertical sectional view taken on line 3-3 of Fig. 1.

Fig. 4 is a transverse sectional view taken on line 4-4 of Fig. 1.

Fig. 5 is a side elevational view showing the rotatable die holder.

Fig. 6 is an end view of the same, and

Figs. 7 and 8 are perspective views showing various forms of cuttingdies employed.

The press comprises a substantial metallic frame', having a pair ofsupport columns 10 at the front, similar elements 11 being at the rear,all four of which are connected by a transversely disposed frame havingsides 12, and end elements 13.

ITherear columns 11 extend upward to a level surface 15, while at thefront, formed with the columns 10 and horizontal elements Specificationof Lettersvlatent.

Patented Apr. 1, 1919.

16, are substantially circular disk-like side plates 18 and 19, having alevel horizontal top 20. y

A cylinder extends inwardly from the frame side 18, throughan enlargedcircular opening 24 formed in the opposite side 19, its bore 22 being ina horizontal plane.

Mounted on the exterior of the cylinder 22 is a drum 25, the bore 26 ofwhich is in register with Ythe bore 23 of the cylinder. This drum 25 isformed witha plurality of flat longitudinal faces 28, containingopenings 29, having beveled side walls adapted to receive the severaldie blocks 30, formed with similarly beveled side edges 31 and 32, thefaces of eachof the die blocks having upon them raised cutters 33,formed withsharp edges and containing openings 34 through which theblanked material passes.

These die blocks are adapted to it neatly within the inclined surfacesof the die holder and maybe lremoved therefrom by pressure from theinterior of the cylindrical opening 26 in the center of the drum.

Secured to the extending end of the drum 22 is a ring 35 having ratchetteeth 36 upon its periphery, and engaged upon the frame element 19,rearward of the axial center of the drum, is a lever 38 pivoted upon thescrew 39, the lever having in its larger inner nd a recess 40, in whichis a slidable pawl 41 normally pressed out by the spring 42 at thebottom of the recess, the pawl engaging with the teeth 36 so that thedrum 22 may be rotated.

The opposite end of the lever 38 is engaged by a pin 44, to a link orconnecting rod 45, its lower end being pivotally engaged at the end of alever 46 fixed upon atransverse shaft 47 mounted in brackets 48 upon theframe sides 12, the opposite end of the shaft 47having secured to it acrank 49, terminating in a foot pedal 50, and it will be evident thatupon depressing the pedal 50 the lever 38 is caused to oscilla-te sothat the pawl 41 will engage with the teeth 36, thereby transmittingrotary motion to the drum, the lever 38 being normally held in anoperativeposition by the coiled tension spring 51.V

Formed through the side plate 18 are openings 52 arranged in a circularrow and agreeing in number and position with the several faces 28 on thedrum. Engageable in the openings 52 is the inturned end of a detentlever 53, fulcrumed in a-bracket 54 provided with an operating handle55, so that the same may be retracted from the openings 52, when it isdesired to transmit rotary motion to the drum, the detent snapping intoposition when the next succeeding,

opening is brought into registration.

Secured on top of the surface 20 is a plate 57, having a raised guard58` rmly afxed thereabove which is readily removable when it is desiredto rotatethe drum, the dies 301 extending upward therethrough.

Afiixed upon the surface 15 is an upper frame 69,, they front portion 6lof which is bored to; receive the plunger spindles 62, engaged withr atransverse bar 63 at their upper end which is pressed normally upward,due to the coiled compression springs 64, the iower end of the spindles62 having adjustably secured to them a pressure plate 65 havingopenings. in conformity with the die immediately therebelow.

Reciprocating motion is transmitted to the transverse bar-.63. by a ring66 having a lug 67v through which passes a pin 68, the ring beingcircumjacent to an eccentric 69;, fixed to a shaft 70. This shaft ismounted in projections 71 extending up from the- 80, mounted upon theend element 13 of the lower transverse frame at the bottom ofthemachine, the shaft having fixed upon it a driving pulley 81 which may becontinuousl'y rotated by a beltv82 from any convenient source of power.

In order toy control rotation of the front operative shaft 70, a fixedfriction clutch element 85 is secured on a rigid shaft 86, having ap-art engageable with concave clutch element 87, held to the shaft 79 bya pin 88, operable in a slot 89, formed therethrough and which isslidable by the movement of' a lever 90, pivoted on the frame 12 on thebracket 91, and drawn normally out of engagement due to the pull of acoi-led tension spring 92, this lever being operable by engagement withthe foot lever 93 having a pedal 94, the lever being fu'lcrumed on thebracket 95, the device being such as e11- gage the friction elementsthereby stopping rotation of shaft 70.

From the foregoing it will be seen that when the power is transmittedto4 the driving pulley 81 and the friction clutches are disconnected,the plungers or spindles will be caused to reciprocate once at eachrevolution of the shaft pressing whatever material may be held by theguides 58 against the vertically disposed die presented immediatelytherebelow, forming a blank which willdropi throliglifinto the cylinder23 and can be readily removed therefrom.

When it is desiredto.l change the dies, the lever 55 is depressed,'thefoot. pedali 5l@ operated so as to bringva new die-'into proper foperative position andthe plum-gers changed tol correspond.

Having thus described my invention what I claim as new `and desire tosecure by Letters Patent, is. i

1. In a blanking press, the combination with a rigid frame, a cylinderrigidly Suipported therein, a plurality of faces formed externally onsaid cylinder, cutting -dies engageable with said faces, a p-air'ofplungers mounted tol reciprocate vertically over said dies, means formoving said plungers, and:

a guide adjacent which work; may bey placed arranged over said dies.

2. 1n a h-lankrng press, the combination with ar rigid frame, ahorizontal shaft rota-v tably mounted at the base thereof, a secondhorizontal shaft mounted at the upper part of said frame, means forcommunicating power from one shaft to the other,4 a pair ofverticalpl-ungers mounted on the upper I part of said frame, aneccentric on said upper shaft whereby'said plungers are given areciprocative movement, a cylindrical.- die holder rotatably mounted -inthe body of' said frame, a plurality of interchangeable dies engaged insaid die holder, means for rotating said die holder wherebyV any`selected die may be brought into 'operative' position, and means forlocking saidv die holder when in. an adjusted position.

3.1n a blanking press, the combination with a rigid frame, a die holdermounted therein, said die holder having a cylindrical central openingextending therethrough, a plurality of cutting dies engageable in-saiddie holder, a ratchet fixed upon said die holfder, a pawi engageablewith the teeth ofl said ratchets, a foot lever whereby said paWl may beoperated and means for locking said die holder when in an adjustedposition.

4. In a blankingA press, the combination with a rigid frame, arotatable, die. holder mounted therein, said die holder having a centralcylindrical opening, a pluralityv of angular faces formed in saiddieholder, means whereby said dies may be secured' therein, pedallyoperated means for rotating tably mounted at the upper end of said saiddie holder, means for locking said die frame, and an eccentric on saidshaft operholder when in an adjusted position, a pair able within saidring whereby said plungers 10 of plungers mounted vertically at the headare caused to move reciprocatvely.

of said frame, a bar connection between the In testimony whereof I haveaiixed my upper ends of said plungers, a ring having signature.

a lug engaged with said bar, a shaft rota- WAWRZYNIEC SKRZYNECKI.

Copies of this patent may be obtained for ve cents each, by addressingthe Gommissioner of Patents, Washington, D. C.

